The posterobasal portion of the axillary membrane, joining the hind margin of the wing to the thorax, forms two basal lobes called the calypteres (sing. calypter; squamae, squamulae). The proximal lobe, called the lower calypter, begins as a narrow, membranous ligament arising from the furrow between the scutellum and the postnotum and ends where the more distal lobe, the upper calypter, folds sharply over it.
Anyone has "Chironomidae of the Holarctic region. Keys and diagnoses. Part 3. Adult Males Entomologica Scandinavica Supplement 34"?
smolwaarneming@gma il.com
Does someone has a scan of Nartshuk E.P. 2003. Key to families of Diptera (Insecta) of the fauna of Russian and adjacent countries. Proceedings of the Zoological Institute Vol. 294: 1-252 for me?